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The colony forms as a yellow, shiny round blob. When looking back at all the data, it is fairly likely that the isolate is Micrococcus luteus, especially when looking at the fluid thyoglycate test, the colony morphology, and the antibiotic susceptibility. Included in the observation of the morphology of the colony is the effect that the bacterial growth has on the sheep erythrocytes in the agar medium. They are normal inhabitants of the human body and may even be essential in keeping the balance among the various . The coagulase test is performed by mixing a sample of organism with rabbit plasma. Bacteria Detail., The Editors of Encyclopdia Britannica. Other Micrococcus isolates produce various useful products, such as long-chain aliphatic hydrocarbons for lubricating oils. For the detection of oxidase enzyme, filter paper circular disks impregnated with tetramethyl-p-phenylenediamine dihydrochloride in dimethyl sulfoxide are used. It is difficult to differentiate Kocuria from Micrococcus with conventional biochemical methods; therefore, these organisms are often reported together as Micrococcus/Kocuria species. Under the microscope they are round cells. It is a gram positive, coccus shaped microbe, and contains catalase. The data on the GC content of the DNA, chemical cell wall analysis, and a comparative analysis of the 16S rRNA sequences. It is an opportunistic pathogen, only pathogenic enough to cause disease in weakened immune systems (Medical Laboratories). Complete lysis of the erythrocytes in the vicinity of the growing colony. Retrieved 06:20, April 16, 2019, from https://en.wikipedia.org/w/index.php?title=Micrococcus_luteus&oldid=887698104, Wikipedia contributors. Similar to the situation in the prosthetic valve endocarditis that is caused by more aggressive and highly resistant bacteria. There have been several deaths in immuno-compromised children that are caused by leukemia from the pulmonary hemorrhages because of Micrococcus. Mangrove ecosystem is a system consisting of biotic and abiotic The PYRA, PAL, LAP, RIB, ARA, MAN, and TRE tests came up as positive. Date: FEB.11.2016 The differentiation is based on the detection of the oxidase enzymes. Institute for Quality and Efficiency in Health Care. The categorization of bacteria in the clinical laboratory is based on the reactivity of the organism when stained by the Grams staining reagents. I then repeated this three more times to further purify the isolate. Most of the species produce carotenoid pigments. It is reported here that gliotoxin selectively spares a unique class of haemopoietic stem cell that forms large (HPP) colonies in the presence of mixtures of MCSF and IL3. appear as agents of infection causing endocarditis. Label the slide with the name of the organism; Place 15 - 20 uL of the culture in the middle of the slide M. lylae can be distinguished from the closely related species Micrococcus luteus by lysozyme susceptibility, genetic composition, and the type of cell-wall peptidoglycan.